INDIVIDUAL PALLETS.
Fifty years ago the pallet and slider sound-board was well nigh universally used, but several of the builders in Germany, and Roosevelt in this country, strongly advocated, and introduced, chests having an independent valve, pallet or membrane, to control the admission of wind to each pipe in the organ.[1]
In almost all of these instances small round valves were used for this purpose.
A good pallet and slider chest is difficult to make, and those constructed by indifferent workmen out of indifferent lumber will cause trouble through "running"—that is, leakage of wind from one pipe to another. In poor chests of this description the slides are apt to stick when the atmosphere is excessively damp, and to become too loose on days when little or no humidity is present.
Individual pallet chests are cheaper to make and they have none of the defects named above. Most of these chests, however, are subject to troubles of their own, and not one of those in which round valves are employed permits the pipes to speak to advantage.
Willis, Hope-Jones, Carlton C. Michell and other artists, after lengthy tests, independently arrived at the conclusion that the best tonal results cannot by any possibility be obtained from these cheap forms of chest. Long pallets and a large and steady body of air below each pipe are deemed essential.[2]